In Situ Mn-Doping-Promoted Conversion of Co(OH)2 to Co3O4 as an Active Electrocatalyst for Oxygen Evolution Reaction

Shipra Raj; Sengeni Anantharaj; Subrata Kundu; Poulomi Roy

doi:10.1021/acssuschemeng.9b01468

In Situ Mn-Doping-Promoted Conversion of Co(OH)₂ to Co₃O₄ as an Active Electrocatalyst for Oxygen Evolution Reaction

Shipra Raj, Sengeni Anantharaj, Subrata Kundu^*, Poulomi Roy

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

Revealing the intrinsic catalytic properties and their dependence on other factors is always a desired challenge in the field of catalysis. Finding and fine-tuning of the inherent electrocatalytic properties of 3D nonprecious metal hydroxides and oxides by a foreign element doping is an attractive domain in the electrocatalysis of water oxidation. This report reveals such an effect of Mn doping on the electrocatalytic oxygen evolution reaction (OER) of Co₃O₄ nanosheet arrays grown on nickel foam (NF) by the ammonia evaporation technique. The Mn doping induces the in situ conversion of Co(OH)₂ into Co₃O₄ during deposition. The strain generation during doping and the presence of metallic Mn are important factors for enhanced OER performance. Such a unique way of doping as well as in situ conversion of hydroxides into oxides offer an excellent electrocatalyst with superior performance compared to pristine Co₃O₄ or Co(OH)₂ nanoflakes.

Original language	English
Pages (from-to)	9690-9698
Number of pages	9
Journal	ACS Sustainable Chemistry and Engineering
Volume	7
Issue number	10
DOIs	https://doi.org/10.1021/acssuschemeng.9b01468
Publication status	Published - 2019 May 20
Externally published	Yes

Keywords

Cobalt hydroxide
Cobalt oxide
Mn doping
Oxygen evolution reaction
Tafel analysis
Water oxidation

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acssuschemeng.9b01468

Cite this

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title = "In Situ Mn-Doping-Promoted Conversion of Co(OH)2 to Co3O4 as an Active Electrocatalyst for Oxygen Evolution Reaction",

abstract = "Revealing the intrinsic catalytic properties and their dependence on other factors is always a desired challenge in the field of catalysis. Finding and fine-tuning of the inherent electrocatalytic properties of 3D nonprecious metal hydroxides and oxides by a foreign element doping is an attractive domain in the electrocatalysis of water oxidation. This report reveals such an effect of Mn doping on the electrocatalytic oxygen evolution reaction (OER) of Co3O4 nanosheet arrays grown on nickel foam (NF) by the ammonia evaporation technique. The Mn doping induces the in situ conversion of Co(OH)2 into Co3O4 during deposition. The strain generation during doping and the presence of metallic Mn are important factors for enhanced OER performance. Such a unique way of doping as well as in situ conversion of hydroxides into oxides offer an excellent electrocatalyst with superior performance compared to pristine Co3O4 or Co(OH)2 nanoflakes.",

keywords = "Cobalt hydroxide, Cobalt oxide, Mn doping, Oxygen evolution reaction, Tafel analysis, Water oxidation",

author = "Shipra Raj and Sengeni Anantharaj and Subrata Kundu and Poulomi Roy",

note = "Funding Information: P.R. gratefully acknowledges the financial support from the Science & Engineering Research Board − Department of Science and Technology (SB/FT/CS-110/2012), New Delhi, India, and Council of Scientific and Industrial Research for this work. S.A. thankfully acknowledges the CSIR, New Delhi, for the award of a Senior Research Fellowship (SRF). Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

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AU - Raj, Shipra

AU - Anantharaj, Sengeni

AU - Kundu, Subrata

AU - Roy, Poulomi

N1 - Funding Information: P.R. gratefully acknowledges the financial support from the Science & Engineering Research Board − Department of Science and Technology (SB/FT/CS-110/2012), New Delhi, India, and Council of Scientific and Industrial Research for this work. S.A. thankfully acknowledges the CSIR, New Delhi, for the award of a Senior Research Fellowship (SRF). Publisher Copyright: Copyright © 2019 American Chemical Society.

PY - 2019/5/20

Y1 - 2019/5/20

N2 - Revealing the intrinsic catalytic properties and their dependence on other factors is always a desired challenge in the field of catalysis. Finding and fine-tuning of the inherent electrocatalytic properties of 3D nonprecious metal hydroxides and oxides by a foreign element doping is an attractive domain in the electrocatalysis of water oxidation. This report reveals such an effect of Mn doping on the electrocatalytic oxygen evolution reaction (OER) of Co3O4 nanosheet arrays grown on nickel foam (NF) by the ammonia evaporation technique. The Mn doping induces the in situ conversion of Co(OH)2 into Co3O4 during deposition. The strain generation during doping and the presence of metallic Mn are important factors for enhanced OER performance. Such a unique way of doping as well as in situ conversion of hydroxides into oxides offer an excellent electrocatalyst with superior performance compared to pristine Co3O4 or Co(OH)2 nanoflakes.

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